Scarfing tool

Abstract

An apparatus for internally removing a raised weld bead of a longitudinal seam welded tube having an elongate mandrel support body. A cutting tool is mounted on the support body adjacent one of its ends and projects outwardly from one surface on the body. A pivot roll and a stabilizing roll are mounted in the support body in spaced relation in the elongate direction of the body and project outwardly from the same surface as the cutting tool. A resiliently mounted carriage roll disposed between the pivot roll and the stabilizing roll which projects outwardly from the surface of the support body opposite the one surface. A tilting roll remotely disposed from the cutting tool and moveable in either vertical direction by cams to effect pivotal movement of the support body about the pivot roll, and advance and retract the cutting tool with respect to the internal weld bead.

What is claimed is: 
     
       1. An apparatus for removing an internal raised weld bead of a longitudinally seam welded tubular member, comprising: a. an elongate support body having first and second ends longitudinally spaced in a cutting direction, said support body having a first surface facing the raised bead of the weld seam and an oppositely facing second surface with said surfaces extending longitudinally between the ends of said support body;   b. a cutting tool mounted at one end of said body and projecting outwardly from said first surface;   c. pivot means mounted in said body intermediate of said first and second ends and projecting outwardly from said first surface;   d. tilting means mounted in said body intermediate of said pivot means and said second end and remote from said cutting tool, said pivot means and said tilting means being longitudinally aligned with each other and with said cutting tool;   e. means for moving said pivot means between said first and said second surfaces of said elongate support body for permitting said support body to tilt about said pivot means;   f. means for actuating said moving means; and   g. carriage means resiliently mounted in said body intermediate said cutting tool and said pivot means and projecting outwardly as said second surface whereby said pivot means constantly engages the inner surface of a tubular member and said tilting means causes said cutting tool mounted at one end of said support body to move toward and away from the internal raised weld bead of the tubular member.   
     
     
       2. The invention defined in claim 1 wherein said means for moving said tilting means between said first and said second surfaces comprises cam means. 
     
     
       3. The invention defined in claim 1 wherein said pivot means, said tilt means and said carriage means comprises rolls. 
     
     
       4. The invention defined in claim 1 wherein said means for actuating said moving means comprises a fluid pressure cylinder. 
     
     
       5. The invention defined in claim 1 including stabilizing means disposed intermediate said cutting and said carriage means and projecting outwardly from said first surface. 
     
     
       6. The invention defined in claim 5 wherein said stabilizing means comprises a roll. 
     
     
       7. The invention defined in claim 1 wherein said elongate support body comprises at least three modular sections rigidly interconnected together.